Speed of Execution

There aren't any noticeable delays with user input and the display. However, there is OCCASSIONAL flicker when we move the frog across the screen because we keep erasing and redrawing the frog in every frame. Although this causes flicker, we must draw the frog in every frame; otherwise, the game loses its interactivity.

Accuracy

Video Signal Timing
The number of cycles it takes to execute the horizontal and vertical sync pulses has to be consistent. Otherwise, this causes jitter when displaying on the TV. In our program, the lines are approximately 63.5 ms long and the horizontal sync is approximately 5 ms long.

Music Frequencies
We did our sounds by ear instead of finding the actual frequency values for notes. In essence, we just made sounds that sounded "okay" to us. :)

Usability
We believe that our game is pretty straightforward and easy to use. People of all ages should be able to enjoy our game. :)